Q. Which of the following reactions are disproportionation reaction ? (a) $2Cu^+ \rightarrow Cu^{2+} + Cu^0$ (b) $3MnO_4^{2-} + 4H^+ \rightarrow 2MnO_4^- + MnO_2 + 2H_2O$ (c) $2KMnO_4 \xrightarrow{\Delta} K_2MnO_4 + MnO_2 + O_2$ (d) $2MnO_4^- + 3Mn^{2+} + 2H_2O \rightarrow 5MnO_2 + 4H^+$ Select the correct option from the following :
A) (a) and (b) only
B) (a), (b) and (c)
C) (a), (c) and (d)
D) (a) and (d) only
Explanation
[Solution] In (a) and (b) the same species is both oxidised and reduced. (c) involves Mn and O redox, and (d) is comproportionation. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.